CVE Vulnerability

CVE-2020-7247

smtp_mailaddr in smtp_session.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session, as demonstrated by shell metacharacters in a MAIL FROM field. This affects the "uncommented" default configuration. The issue exists because of an incorrect return value upon failure of input validation.

10 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

9.8 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45 Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/01/28/3 Exploit Mailing List
https://www.openbsd.org/security.html Patch Vendor Advisory
http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html Exploit Third Party Advisory
https://seclists.org/bugtraq/2020/Jan/51 Mailing List Third Party Advisory
https://www.debian.org/security/2020/dsa-4611 Third Party Advisory
http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html Third Party Advisory VDB Entry
https://www.kb.cert.org/vuls/id/390745 Third Party Advisory US Government Resource
http://seclists.org/fulldisclosure/2020/Jan/49 Mailing List Third Party Advisory
http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html Exploit Third Party Advisory
http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html Exploit Third Party Advisory
https://usn.ubuntu.com/4268-1/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ Mailing List Third Party Advisory
http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html Broken Link
Configurations

Configuration 1

cpe:2.3:a:openbsd:opensmtpd:6.6:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
Information

Published : 2020-01-29 04:15

Updated : 2022-04-29 01:24

NVD link : CVE-2020-7247

Mitre link : CVE-2020-7247

Products Affected
No products.
CWE
CWE-755

CWE-78